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A mineral cannot be scratched by a finger nailbut can be scratched by a penny. What is the approximate hardness of this mineral?
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Feb 3, 2024
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A mineral cannot be scratched by a finger nailbut can be scratched by a penny. What is the approximate hardness of this mineral?
Geography
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Hishaam Namooya
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somewhere between 2.5 and 3.5
Heltonbiker
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Feb 8, 2024
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Heltonbiker
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